Research on comprehensive technologies of mine fire extinguishing and gas outburst prevention for fully mechanized coal mining face in seam with coal spontaneous combustion and coal outburst in potential是什么意思_Research on comprehensive technologies of mine fire extinguishing and gas outburst prevention for fully mechanized coal mining face in seam with coal spontaneous combustion and coal outburst in potential在线翻译_英语_读音_用法_例句